Box body structure and battery pack

Abstract

The utility model belongs to the technical field of batteries, and discloses a box body structure and a battery pack. The box structure comprises a base, a first support and a second support. The base comprises an outer frame and a bottom plate detachably connected with the outer frame. The first support is arranged on the outer frame, a first mounting position is arranged on the bottom surface of the first support, and the first mounting position is used for being detachably connected with a circuit breaking module; the second support is connected with the first support and located above the first support, a second installation position is arranged on the bottom face of the second support, and the second installation position is used for being detachably connected with a management module. When the circuit breaking module and the management module need to be maintained, the bottom plate can be disassembled firstly, and then the circuit breaking module and the management module can be disassembled in sequence from the lower portion, so that maintenance is facilitated. When the circuit breaking module and the management module need to be installed, the management module and the circuit breaking module can be installed in sequence, and operation is convenient.

Description

Technical Field

[0001] This utility model relates to the field of battery technology, and in particular to a box structure and a battery pack. Background Technology

[0002] The battery pack includes a housing, cell modules housed within the housing, a management system (BMS), and a battery distribution unit (BDU). The management system is used for intelligent management and maintenance of the cell modules, extending battery life and monitoring battery status. The battery distribution unit is responsible for monitoring and managing the charging and discharging process to ensure efficient battery operation and safety.

[0003] Currently, the battery pack uses a fully encapsulated foam design, with all components assembled into the casing from top to bottom and bonded together as a single unit using foam adhesive. Because the casing's top cover is non-removable after bonding, maintenance of the management and circuit breaker modules becomes difficult. Changing to a more repairable design would require adding a maintenance cover, which would not only increase the number of components and costs but also increase the risk of seal failure. Utility Model Content

[0004] The purpose of this utility model is to provide a box structure and battery pack that can solve the problem of difficult battery pack maintenance, eliminate the need for an additional maintenance box cover, save costs, and reduce the risk of seal failure.

[0005] To achieve this objective, the present invention adopts the following technical solution:

[0006] A box structure, comprising:

[0007] A base, the base including an outer frame and a bottom plate detachably connected to the outer frame;

[0008] A first bracket is disposed on the outer frame, and a first mounting position is provided on the bottom surface of the first bracket. The first mounting position is used for detachable connection of the circuit breaker module.

[0009] The second bracket is connected to the first bracket and located above the first bracket. The bottom surface of the second bracket is provided with a second mounting position for detachably connecting the management module.

[0010] As an alternative to the aforementioned box structure, the first bracket includes two opposing support members, the two ends of the second bracket are respectively connected to the corresponding support members, a clearance space is formed between the two support members, and the second mounting position is located above the clearance space.

[0011] As an alternative to the aforementioned box structure, the support member is provided with a through hole, and a fastening component is fitted inside the through hole. The fastening component is used to fix the circuit breaker module and the second bracket to both sides of the support member, respectively.

[0012] As an alternative to the aforementioned box structure, the supporting member is a hollow beam.

[0013] As an alternative to the above-mentioned housing structure, the first mounting position includes a positioning groove, and the circuit breaker module includes a mounting lug, the positioning groove being able to accommodate the mounting lug.

[0014] As an alternative to the aforementioned box structure, the second bracket includes:

[0015] A top plate, wherein the bottom surface of the top plate is provided with the second mounting position;

[0016] The top plate has two sides, and the two opposite ends of the top plate are connected to the sides, which are detachably connected to the first bracket.

[0017] As an alternative to the aforementioned enclosure structure, at least one of the sides is provided with a window, which is directly opposite the interface on the management module.

[0018] As an alternative to the aforementioned box structure, the side portion includes:

[0019] Side plate, the top end of which is connected to the top plate;

[0020] A bottom flap is connected to the bottom end of the side panel and extends outward from the side panel. The bottom flap is detachably connected to the first bracket.

[0021] Side flaps are provided on both opposite sides of the side panel, and the adjacent two sides of the side flaps are respectively connected to the side panel and the bottom flap.

[0022] As an alternative to the aforementioned box structure, the outer frame includes a side frame and a crossbeam. The two ends of the crossbeam are respectively connected to the inner wall of the side frame to divide the side frame into an electrical cavity and a power supply cavity. The first bracket and the second bracket are both located in the electrical cavity.

[0023] A battery pack includes a cell module, a management module, a circuit breaker module, and the aforementioned housing structure. The cell module is disposed within the base, the circuit breaker module is disposed at the first mounting position, and the management module is disposed at the second mounting position.

[0024] The beneficial effects of this utility model are:

[0025] The enclosure structure provided by this utility model features a detachable bottom plate and a bracket adapted for inverted assembly of the circuit breaker module and the management module. When maintenance of the circuit breaker module and the management module is required, the bottom plate can be removed first, followed by the sequential removal of the circuit breaker module and the management module from below, facilitating maintenance. When installation of the circuit breaker module and the management module is required, they can be installed sequentially, making operation convenient. This design eliminates the need for an additional maintenance cover, reducing the number of parts in the enclosure structure, lowering costs, and simplifying maintenance.

[0026] The battery pack provided by this utility model adopts the above-mentioned box structure, which can solve the problem of difficult battery pack maintenance, eliminates the need for an additional maintenance box cover, saves costs, and reduces the risk of seal failure. Attached Figure Description

[0027] Figure 1 This is a structural schematic diagram of the box structure provided by this utility model;

[0028] Figure 2 This is a schematic diagram of the box structure, circuit breaker module, and management module provided by this utility model when they are not assembled;

[0029] Figure 3 This is an exploded view of the first and second supports provided by this utility model.

[0030] In the picture:

[0031] 10. Outer frame; 11. Frame; 12. Crossbeam; 20. Base plate; 30. First bracket; 31. Support component; 311. Positioning groove; 40. Second bracket; 41. Top plate; 42. Side; 421. Side plate; 4211. Window; 422. Bottom flap; 423. Side flap; 200. Management module; 300. Circuit breaker module; 310. Mounting lug. Detailed Implementation

[0032] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present invention and not intended to limit it. Furthermore, it should be noted that, for ease of description, the accompanying drawings show only the parts relevant to the present invention, not the entire structure.

[0033] In the description of this utility model, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0034] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0035] In the description of this embodiment, the terms "upper," "lower," "right," etc., refer to the orientation or positional relationship shown in the accompanying drawings. They are used only for ease of description and simplification of operation, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. In addition, the terms "first" and "second" are only used for distinction in description and have no special meaning.

[0036] like Figure 1 As shown, this embodiment provides a battery pack, including a cell module, a circuit breaker module 300, a management module 200, and a housing structure. The cell module, circuit breaker module 300, and management module 200 are all housed within the housing structure. Both the circuit breaker module 300 and the management module 200 are electrically connected to the cell module. The management module 200 is used for intelligent management and maintenance of the cell module, extending the battery's lifespan and monitoring the battery's status. The circuit breaker module 300 is responsible for monitoring and managing the battery's charging and discharging process to ensure the battery's efficient operation and safety performance.

[0037] It should be noted that both the circuit breaker module 300 and the management module 200 are common structures in the field, and their specific structures and connection circuits with the battery cell module are existing technologies, which will not be described in detail in this embodiment.

[0038] To facilitate maintenance of the circuit breaker module 300 and the management module 200, the enclosure structure includes a base, a first bracket 30, and a second bracket 40. The base includes an outer frame 10 and a bottom plate 20 detachably connected to the outer frame 10. The first bracket 30 is detachably mounted on the outer frame 10, and its bottom surface has a first mounting position for detachably connecting the circuit breaker module 300. The second bracket 40 is detachably connected to the first bracket 30 and located above it. Its bottom surface has a second mounting position for detachably connecting the management module 200. With this configuration, when maintenance of the circuit breaker module 300 and the management module 200 is required, the bottom plate 20 can be removed first, and then the circuit breaker module 300 and the management module 200 can be disassembled sequentially from below for easy maintenance. When installing the circuit breaker module 300 and the management module 200, they can be installed sequentially, making the operation convenient.

[0039] It should be noted here that the up and down directions are... Figure 1 In the Z-direction, the bottom surface of the first bracket 30 is the side surface facing the base plate 20, and the first mounting position is located on the bottom surface of the first bracket 30, which facilitates the installation of the circuit breaker module 300 from bottom to top; the bottom surface of the second bracket 40 is the side surface facing the base plate 20, and the second mounting position is located on the bottom surface of the second bracket 40, which facilitates the installation of the management module 200 from bottom to top.

[0040] In this embodiment, the enclosure structure adopts a detachable base plate 20, which eliminates the need for additional maintenance doors, allowing for battery pack maintenance. This reduces the number of parts, lowers costs, and reduces the risk of battery pack seal failure. Furthermore, the circuit breaker module 300 and the management module 200 can be installed and locked from bottom to top, making operation convenient.

[0041] In some embodiments, such as Figure 1 As shown, the outer frame 10 includes a side frame 11 and a crossbeam 12. The two ends of the crossbeam 12 are connected to the inner wall of the side frame 11, dividing the side frame 11 into an electrical cavity and a power supply cavity. The first bracket 30 and the second bracket 40 are both located in the electrical cavity, while the power supply cavity is used to house the battery cell module. By setting the crossbeam 12, the electrical components and the battery cell module can be separated, which helps ensure the safety of the battery pack. The electrical components within the electrical cavity can be maintained after removing the base plate 20, facilitating fault elimination.

[0042] Optionally, the frame 11 is approximately rectangular, and the crossbeam 12 extends along the Y direction. The crossbeam 12 divides the internal space of the frame 11 into a power cavity and an electrical cavity arranged along the X direction. The dimension of the power cavity along the X direction is larger than that of the electrical cavity along the X direction to ensure the cell capacity within the power cavity, which is beneficial to improving the energy density of the battery pack. The X, Y, and Z directions are perpendicular to each other.

[0043] In some embodiments, to improve the strength of the base, the outer frame 10 also includes a longitudinal beam extending in the X direction. The longitudinal beam is located inside the power supply cavity, with one end connected to the crossbeam 12 and the other end connected to the outer frame 10, thereby improving the strength of the base.

[0044] Optionally, two longitudinal beams can be provided, spaced apart, and the battery cell module can be placed between the two longitudinal beams. It should be noted that the number of longitudinal beams can be set as needed, and can be one, three, four or more.

[0045] To avoid interference from the first support 30 with the disassembly and assembly of the management module 200, in some embodiments, such as Figure 2 and Figure 3 As shown, the first bracket 30 includes two support members 31 arranged opposite to each other. The two ends of the second bracket 40 are respectively connected to the corresponding support members 31, and a clearance space is formed between the two support members 31. The second mounting position is located above the clearance space, so that the management module 200 of the second mounting position can be disassembled and assembled through the clearance space to avoid structural interference.

[0046] Optionally, the support member 31 extends along the X direction, with one end connected to the outer frame 10 and the other end connected to the crossbeam 12. The electrical cavity has a small dimension along the X direction, and extending the support member 31 along the X direction shortens its length and increases its strength, thereby ensuring the stability of the second bracket 40, the circuit breaker module 300, and the management module 200.

[0047] To improve the securing effect of the circuit breaker module 300, the first mounting position includes a positioning groove 311, and the circuit breaker module 300 includes a mounting lug 310. The positioning groove 311 can accommodate the mounting lug 310. Through the cooperation of the mounting lug 310 and the positioning groove 311, the circuit breaker module 300 and the first bracket 30 are positioned, facilitating their fixing and improving the positional accuracy after fixing. Specifically, the positioning groove 311 is located on the bottom surface of the support member 31, facilitating the installation of the circuit breaker module 300 from bottom to top.

[0048] In some embodiments, each support member 31 may be provided with at least two positioning slots 311. Correspondingly, the circuit breaker module 300 is provided with mounting lugs 310 for each positioning slot 311 to increase the fixed position of the circuit breaker module 300 and the first bracket 30 and improve the fixing effect of the two.

[0049] In some embodiments, the first bracket 30 and the outer frame 10 can be fixed by welding or snap-fitting, or by fasteners such as screws.

[0050] In some embodiments, the support member 31 is provided with a through hole, and a fastening component is fitted into the through hole. The fastening component is used to fix the circuit breaker module 300 and the second bracket 40 to the two sides of the support member 31, respectively. That is, the fastening component can fix the second bracket 40 to the top surface of the support member 31 and fix the circuit breaker module 300 to the bottom surface of the support member 31. The circuit breaker module 300 and the second bracket 40 share the same fastening component and through hole, which not only reduces the number of fastening components, thereby reducing the number of parts in the housing structure and reducing costs, but also reduces the number of through holes on the support member 31, which helps to improve the strength of the support member 31 and ensure the stability of the circuit breaker module 300 and the second bracket 40.

[0051] Alternatively, the fastening components may include bolts and nuts, or other structures such as screws, as long as they can mate with through holes to secure the circuit breaker module 300, the second bracket 40, and the support member 31.

[0052] In some embodiments, the support member 31 can be a hollow beam. Hollow beams are lightweight and have good strength, which can meet the strength requirements of fixing the circuit breaker module 300 and the second bracket 40.

[0053] In some embodiments, the second bracket 40 includes a top plate 41 and two side portions 42. The bottom surface of the top plate 41 is provided with a second mounting position. The two opposite ends of the top plate 41 are connected to the side portions 42, making the top plate 41 and the two side portions 42 approximately U-shaped. The side portions 42 are detachably connected to the first bracket 30. With the above arrangement, the management module 200 is located below the top plate 41 and between the two side portions 421. The second bracket 40 can better protect the management module 200. The distance between the top plate 41 and the support member 31 is large, which can not only accommodate the management module 200, but also at least part of the circuit breaker module 300, so as to protect the circuit breaker module 300.

[0054] In some embodiments, such as Figure 3 As shown, the side portion 42 includes a side plate 421, a bottom flap 422, and a side flap 423. The top end of the side plate 421 is connected to the top plate 41, and the bottom end of the side plate 421 is connected to the bottom flap 422. The bottom flap 422 extends outward from the side plate 421 and is used to overlap the first bracket 30 and is detachably connected to the first bracket 30. Side flaps 423 are provided on opposite sides of the side plate 421, and adjacent sides of the side flaps 423 are connected to the side plate 421 and the bottom flap 422, respectively. By providing the bottom flap 422, the contact area between the side portion 42 and the support member 31 can be increased, improving the fixing effect. By providing the side flap 423, the strength of the side portion 42 can be strengthened, improving the structural stability of the second bracket 40.

[0055] In some embodiments, at least one side 42 is provided with a window 4211, which faces the interface on the management module 200 to facilitate the connection of the interface with the corresponding wiring harness.

[0056] Obviously, the above embodiments of this utility model are merely examples for clearly illustrating the present utility model, and are not intended to limit the implementation of the present utility model. Those skilled in the art can make various obvious changes, readjustments, and substitutions without departing from the protection scope of this utility model. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the protection scope of the claims of this utility model.

Claims

1. A box structure, characterized in that, include: The base includes an outer frame (10) and a base plate (20) detachably connected to the outer frame (10); A first bracket (30) is disposed on the outer frame (10). The bottom surface of the first bracket (30) is provided with a first mounting position, which is used for detachable connection of the circuit breaker module (300). The second bracket (40) is connected to the first bracket (30) and is located above the first bracket (30). The bottom surface of the second bracket (40) is provided with a second mounting position, which is used to detachably connect the management module (200).

2. The box structure according to claim 1, characterized in that, The first bracket (30) includes two support members (31) arranged opposite to each other. The two ends of the second bracket (40) are respectively connected to the corresponding support members (31). A clearance space is formed between the two support members (31), and the second mounting position is located above the clearance space.

3. The box structure according to claim 2, characterized in that, The support member (31) is provided with a through hole, and a fastening component is fitted inside the through hole. The fastening component is used to fix the circuit breaker module (300) and the second bracket (40) to the two sides of the support member (31) respectively.

4. The box structure according to claim 2, characterized in that, The support member (31) is a hollow beam.

5. The box structure according to any one of claims 1-4, characterized in that, The first mounting position includes a positioning groove (311), and the circuit breaker module (300) includes a mounting lug (310), the positioning groove (311) being able to accommodate the mounting lug (310).

6. The box structure according to any one of claims 1-4, characterized in that, The second support (40) includes: Top plate (41), the bottom surface of which is provided with the second mounting position; Two side sections (42) are connected to opposite ends of the top plate (41), and the side sections (42) are detachably connected to the first bracket (30).

7. The box structure according to claim 6, characterized in that, At least one of the side portions (42) is provided with a window (4211) which is directly opposite the interface on the management module (200).

8. The box structure according to claim 6, characterized in that, The side portion (42) includes: Side plate (421), the top end of which is connected to the top plate (41); Bottom flap (422) is connected to the bottom end of the side plate (421) and extends outward from the side plate (421). The bottom flap (422) can be detachably connected to the first bracket (30). Side flaps (423) are provided on both sides of the side plate (421), and the adjacent sides of the side flaps (423) are respectively connected to the side plate (421) and the bottom flap (422).

9. The box structure according to any one of claims 1-4, characterized in that, The outer frame (10) includes a side frame (11) and a crossbeam (12). The two ends of the crossbeam (12) are connected to the inner wall of the side frame (11) to divide the side frame (11) into an electrical cavity and a power supply cavity. The first bracket (30) and the second bracket (40) are both located in the electrical cavity.

10. A battery pack, characterized in that, The device includes a battery cell module, a management module (200), a circuit breaker module (300), and a housing structure as described in any one of claims 1-9. The battery cell module is disposed within the base, the circuit breaker module (300) is disposed at the first mounting position, and the management module (200) is disposed at the second mounting position.

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